311 - x + 82 = 46 + ( x - 21 )
311-x+82=46+(x-21)
truong ngoc huyen toa ncopy bai cua nguoi khac chu trinh ga cong nghiep nhu no lam sao lam duoc bai nay
311-x+82=46+(x-21)
=>311+82-46+21=2x
x=184
tik nha Wan đẹp zai
311-x+82=46+(x-21). Tìm x
=> 311 - x + 82 = 46 + x - 21
=> 393 - x = x + 25
=> 2x = 368
=> x = 184
311-x+82=46+x-21
-(x-3+84)=-x+70-71-5
\(311-x+82=46+x-21\)
\(393-x=x+25\)
\(x+x=393-25\)
\(2x=368\)
\(x=184\)
Tìm x
311-x+82=46+x-21
-(x-3+84)=-x+70-71-5
\(311-x+82=46+x-21\)
\(393-x=x+25\)
\(x+x=393-25\)
\(2x=368\)
\(x=184\)
\(-\left(x-3+84\right)=-x+70-71-5\)
\(-x+3-84=-x+70-71-5\)
\(-x-81=-x-6\)
\(-x+x=-6+81\)
\(0x=75\)
=> pt vô nghiệm
tim so nguyen x
a,311-x+82=46+(x-21)
b,-(x-3+85)=(x+70-71)-5
Tìm x :
a/ x3 - 2 . x2 = 0
b/ 311 - x + 82 = 46 + ( x - 21 ) - 3x
a/ x2 .(x -2)=0
suy ra hoặc x2=0
hoặc x-2=0
hoặc cả hai =0
từ đó tính ra x
311-x+82=46+(x-21)
-(x-3+85)=(x+70-71)-5
(-x+821+534)=499+(X-84)
x+96=(443-x)-447
\(1.311-x+82=46+\left(x-21\right)\\ 311+82-x=46-21+x\\ 393-x=25+x\\ 393-x-25-x=0\\ 393-25-x-x=0\\ 368-2x=0\\ \Rightarrow-2x=368\\ x=368:\left(-2\right)\\ x=-184\)
\(2.-\left(x-3+85\right)=\left(x+70-71\right)-5\\ -x+3-85=x+70-71-5\\ -x-82=x-6\\ -x-82-x+6=0\\ -2x-76=0\\ -2x=76\\ x=76:\left(-2\right)\\ x=-38\)
\(3.\left(-x+821+534\right)=499+\left(x-84\right)\\ -x+821+534=499+x-84\\ -x+1355=x+415\\ -x+1355-x-415=0\\ -2x+940=0\\ -2x=-940\\ x=-940:\left(-2\right)\\ x=470\)
\(4.x+96=\left(443-x\right)-447\\x+96=443-x-447\\ x+96=-x-4\\ x+96+x+4=0\\ 2x+100=0\\ 2x=-100\\ x=-100:2\\ x=-50 \)
1,tìm x
a,311-x+82=46=(x-21)
b,/3x-15/=0
c,/x+9/=12
giúp mk vs m.n
câu a=219
câu b = 5 nha có 2 trường hợp xảy ra
câu c tương tự câu b nha bn
Tìm x :
a/ x3 - 2 . x2 =0
b/ 311 - x + 82 = 46 + ( x -21) - 3x
Giải chi tiết giúp mình
câu a)x3-2.x2=0
=>x2.(x-2)=0
=>x2=0 hoặc x-2=0
=>x thuộc{0;2}
Vậy x thuộc{0;2}
Câu b)311-x+82=46+(x-21)-3x
=>393-x=25-2x
=>393-x=25-x-x
=>393=25-x
=>x=-368
Vậy x= -368